| Circular Number | Circular Title | Summary | State(s) | Date |
| CC-AA-2025-012 | COMMUNITY MITIGATION CLASSIFICATION CHANGES EFFECTIVE APRIL 1, 2026 | ISO announces changes in community public fire protection and building code effectiveness classifications. The changes are applicable to all policies written on or after April 1, 2026. | All | 12/22/2025 |
| LI-CA-2025-334 | COMMERCIAL AUTO 2026 MULTISTATE FORMS REVISION BEING SUBMITTED | ISO announces the submission of a Commercial Auto multistate forms revision. The filing has a proposed effective date of September 1, 2026. ISO cautions the filing has not yet been implemented. | All | 12/22/2025 |
| LI-CA-2025-335 | COMMERCIAL AUTO 2026 MULTISTATE RULES REVISION BEING SUBMITTED | ISO announces the submission of a Commercial Auto multistate rules revision. The filing has a proposed effective date of September 1, 2026. ISO cautions the filing has not yet been implemented. | All | 12/22/2025 |
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Circular Tracker 12-22-25
A summary of the ISO Circular for December 22, 2025. Circulars provide a wide variety of information from form changes to rules, loss costs, experience reviews, and other information.
FC&S Editors | December 22, 2025